drivers: video: Implement video control framework

Implement the video control framework with the following features:

- Drivers initialize the control with a valid value range at boot which
  guides the application developer and the framework. Hence, the video
  framework could do all common works for drivers e.g., sanity check.

- Controls need to be cached to memory. Video framework handles
  get_ctrl(), drivers don't need to implement this API. It is because
  reading control value directly from registers are not only inefficient
  but also sometimes impossible, e.g. controls that scatter through
  several registers. Only "volatile" control needs to be updated at
  runtime.

- Only the devices (e.g., sensors) owning the controls need to
  implement set_ctrl(). Other devices of the pipeline do not need to
  propagate set_ctrl() and hence, do not need to implement this API

Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>